initial check-in (post crash)

1 files changed, 256 insertions, 0 deletions

diff --git a/src/glut/glx/win32_glx.c b/src/glut/glx/win32_glx.c
new file mode 100644
index 00000000000..ecfff44b930
--- /dev/null
+++ b/src/glut/glx/win32_glx.c
@@ -0,0 +1,256 @@
+
+/* Copyright (c) Nate Robins, 1997. */
+
+/* This program is freely distributable without licensing fees
+   and is provided without guarantee or warrantee expressed or
+   implied. This program is -not- in the public domain. */
+
+#include <stdio.h>
+#include "glutint.h"
+#include "win32_glx.h"
+
+/* global current HDC */
+extern HDC XHDC;
+
+GLXContext
+glXCreateContext(Display * display, XVisualInfo * visinfo,
+  GLXContext share, Bool direct)
+{
+  /* KLUDGE: GLX really expects a display pointer to be passed
+     in as the first parameter, but Win32 needs an HDC instead,
+     so BE SURE that the global XHDC is set before calling this
+     routine. */
+  HGLRC context;
+
+  context = CreateContext(XHDC);
+
+#if 0
+  /* XXX GLUT doesn't support it now, so don't worry about display list
+     and texture object sharing. */
+  if (share) {
+    wglShareLists(share, context);
+  }
+#endif
+
+  /* Since direct rendering is implicit, the direct flag is
+     ignored. */
+
+  return context;
+}
+
+int
+glXGetConfig(Display * display, XVisualInfo * visual, int attrib, int *value)
+{
+  if (!visual)
+    return GLX_BAD_VISUAL;
+
+  switch (attrib) {
+  case GLX_USE_GL:
+    if (visual->dwFlags & (PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW)) {
+      /* XXX Brad's Matrix Millenium II has problems creating
+         color index windows in 24-bit mode (lead to GDI crash)
+         and 32-bit mode (lead to black window).  The cColorBits
+         filed of the PIXELFORMATDESCRIPTOR returned claims to
+         have 24 and 32 bits respectively of color indices. 2^24
+         and 2^32 are ridiculously huge writable colormaps.
+         Assume that if we get back a color index
+         PIXELFORMATDESCRIPTOR with 24 or more bits, the
+         PIXELFORMATDESCRIPTOR doesn't really work and skip it.
+         -mjk */
+      if (visual->iPixelType == PFD_TYPE_COLORINDEX
+        && visual->cColorBits >= 24) {
+        *value = 0;
+      } else {
+	*value = 1;
+      }
+    } else {
+      *value = 0;
+    }
+    break;
+  case GLX_BUFFER_SIZE:
+    /* KLUDGE: if we're RGBA, return the number of bits/pixel,
+       otherwise, return 8 (we guessed at 256 colors in CI
+       mode). */
+    if (visual->iPixelType == PFD_TYPE_RGBA)
+      *value = visual->cColorBits;
+    else
+      *value = 8;
+    break;
+  case GLX_LEVEL:
+    /* The bReserved flag of the pfd contains the
+       overlay/underlay info. */
+    *value = visual->bReserved;
+    break;
+  case GLX_RGBA:
+    *value = visual->iPixelType == PFD_TYPE_RGBA;
+    break;
+  case GLX_DOUBLEBUFFER:
+    *value = visual->dwFlags & PFD_DOUBLEBUFFER;
+    break;
+  case GLX_STEREO:
+    *value = visual->dwFlags & PFD_STEREO;
+    break;
+  case GLX_AUX_BUFFERS:
+    *value = visual->cAuxBuffers;
+    break;
+  case GLX_RED_SIZE:
+    *value = visual->cRedBits;
+    break;
+  case GLX_GREEN_SIZE:
+    *value = visual->cGreenBits;
+    break;
+  case GLX_BLUE_SIZE:
+    *value = visual->cBlueBits;
+    break;
+  case GLX_ALPHA_SIZE:
+    *value = visual->cAlphaBits;
+    break;
+  case GLX_DEPTH_SIZE:
+    *value = visual->cDepthBits;
+    break;
+  case GLX_STENCIL_SIZE:
+    *value = visual->cStencilBits;
+    break;
+  case GLX_ACCUM_RED_SIZE:
+    *value = visual->cAccumRedBits;
+    break;
+  case GLX_ACCUM_GREEN_SIZE:
+    *value = visual->cAccumGreenBits;
+    break;
+  case GLX_ACCUM_BLUE_SIZE:
+    *value = visual->cAccumBlueBits;
+    break;
+  case GLX_ACCUM_ALPHA_SIZE:
+    *value = visual->cAccumAlphaBits;
+    break;
+  default:
+    return GLX_BAD_ATTRIB;
+  }
+  return 0;
+}
+
+XVisualInfo *
+glXChooseVisual(Display * display, int screen, int *attribList)
+{
+  /* KLUDGE: since we need the HDC, MAKE SURE to set XHDC
+     before calling this routine. */
+
+  int *p = attribList;
+  int pf;
+  PIXELFORMATDESCRIPTOR pfd;
+  PIXELFORMATDESCRIPTOR *match = NULL;
+  int stereo = 0;
+
+  /* Avoid seg-faults. */
+  if (!p)
+    return NULL;
+
+  memset(&pfd, 0, sizeof(PIXELFORMATDESCRIPTOR));
+  pfd.nSize = (sizeof(PIXELFORMATDESCRIPTOR));
+  pfd.nVersion = 1;
+
+  /* Defaults. */
+  pfd.dwFlags = PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW;
+  pfd.iPixelType = PFD_TYPE_COLORINDEX;
+  pfd.cColorBits = 32;
+  pfd.cDepthBits = 0;
+
+  while (*p) {
+    switch (*p) {
+    case GLX_USE_GL:
+      pfd.dwFlags |= PFD_SUPPORT_OPENGL;
+      break;
+    case GLX_BUFFER_SIZE:
+      pfd.cColorBits = *(++p);
+      break;
+    case GLX_LEVEL:
+      /* the bReserved flag of the pfd contains the
+         overlay/underlay info. */
+      pfd.bReserved = *(++p);
+      break;
+    case GLX_RGBA:
+      pfd.iPixelType = PFD_TYPE_RGBA;
+      break;
+    case GLX_DOUBLEBUFFER:
+      pfd.dwFlags |= PFD_DOUBLEBUFFER;
+      break;
+    case GLX_STEREO:
+      stereo = 1;
+      pfd.dwFlags |= PFD_STEREO;
+      break;
+    case GLX_AUX_BUFFERS:
+      pfd.cAuxBuffers = *(++p);
+      break;
+    case GLX_RED_SIZE:
+      pfd.cRedBits = 8; /* Try to get the maximum. */
+      ++p;
+      break;
+    case GLX_GREEN_SIZE:
+      pfd.cGreenBits = 8;
+      ++p;
+      break;
+    case GLX_BLUE_SIZE:
+      pfd.cBlueBits = 8;
+      ++p;
+      break;
+    case GLX_ALPHA_SIZE:
+      pfd.cAlphaBits = 8;
+      ++p;
+      break;
+    case GLX_DEPTH_SIZE:
+      pfd.cDepthBits = 32;
+      ++p;
+      break;
+    case GLX_STENCIL_SIZE:
+      pfd.cStencilBits = *(++p);
+      break;
+    case GLX_ACCUM_RED_SIZE:
+    case GLX_ACCUM_GREEN_SIZE:
+    case GLX_ACCUM_BLUE_SIZE:
+    case GLX_ACCUM_ALPHA_SIZE:
+      /* I believe that WGL only used the cAccumRedBits,
+	 cAccumBlueBits, cAccumGreenBits, and cAccumAlphaBits fields
+	 when returning info about the accumulation buffer precision.
+	 Only cAccumBits is used for requesting an accumulation
+	 buffer. */
+      pfd.cAccumBits = 1;
+      ++p;
+      break;
+    }
+    ++p;
+  }
+
+  /* Let Win32 choose one for us. */
+  pf = ChoosePixelFormat(XHDC, &pfd);
+  if (pf > 0) {
+    match = (PIXELFORMATDESCRIPTOR *) malloc(sizeof(PIXELFORMATDESCRIPTOR));
+    DescribePixelFormat(XHDC, pf, sizeof(PIXELFORMATDESCRIPTOR), match);
+
+    /* ChoosePixelFormat is dumb in that it will return a pixel
+       format that doesn't have stereo even if it was requested
+       so we need to make sure that if stereo was selected, we
+       got it. */
+    if (stereo) {
+      if (!(match->dwFlags & PFD_STEREO)) {
+        free(match);
+	return NULL;
+      }
+    }
+    /* XXX Brad's Matrix Millenium II has problems creating
+       color index windows in 24-bit mode (lead to GDI crash)
+       and 32-bit mode (lead to black window).  The cColorBits
+       filed of the PIXELFORMATDESCRIPTOR returned claims to
+       have 24 and 32 bits respectively of color indices. 2^24
+       and 2^32 are ridiculously huge writable colormaps.
+       Assume that if we get back a color index
+       PIXELFORMATDESCRIPTOR with 24 or more bits, the
+       PIXELFORMATDESCRIPTOR doesn't really work and skip it.
+       -mjk */
+    if (match->iPixelType == PFD_TYPE_COLORINDEX
+      && match->cColorBits >= 24) {
+      free(match);
+      return NULL;
+    }
+  }
+  return match;
+}